I just finished renewing my license a month ago. I feel whether you work on lead projects or not, in our field, it is worth taking the class so you understand the potential hazards and risks to yourself, employees, and customers. NO level of lead in your blood stream is healthy, although it is true that as an adult, a small amount of exposure is not going to have much of an impact like it will on young children and the elderly. If you don't feel sick, I would imagine any exposure you had would be quite minor and your body will naturally flush it out. The bigger concern is the contamination to the soil and area. You did the right thing by removing as much as possible, but if anything happens in the future related to lead, you are still on the hook. I would just make sure the site is as clean as possible, get it painted, and move on. When I started in 1991, lead was being talked about, but there were no classes or much help to address it, and no one that I could see was really doing anything differently. I am sure I scraped and sanded plenty of lead houses with just an N95 dust mask on as my only protection and I never felt sick. Some days, in the middle of summer when it was hot, the dust would stick all over us because of the sweat. I also don't ever recall doing any type of work like that that happened to have young kids around. According to the instructor, back then, 15 micrograms of lead in a child was considered severe poisoning. Today, severe is 5 micrograms. I would just also point out that any drops you used around the house to collect chips while you worked are considered contaminated. DO NOT bring them to another job, otherwise you risk contaminating someone else's property. Probably a small risk, but the cost of replacing the drops will be far less than the cost associated with a lead issue.
Just as a side story, since you scraped, odds of contaminating the neighbor's property are probably pretty slim unless the houses are on top of each other. We were working on a job a few years back and the contractor next door was old school disc sanding an obvious lead house, and then using a leaf blower to blow the dust off everything. He contaminated the whole neighborhood. You could see the plume of dust wafting across the street going everywhere. I didn't want to be the guy to report him to the authorities, but I did mention it to the homeowner who had kids in case they were concerned. He just shrugged like it was nothing, so nothing happened.
